I wrote that http://www.thejapanesepage.com/event/ ( now the link is on the front page) seemed to show all events by the various groups. But it was shown only after deletion of the groups. If you create a event from an user log-in column, it appears on the event calender.Your group event is shown only when you are logging-in.

On my screen, submitted time was shown as 12/31/1969-8:00pm (UST), when I saw it on the preview.